https://nic.ccut.edu.cn/system/resource/js/photoswipe/3.0.5.1/klass.min.js

1!function (name, definition) {
2  if (typeof define == 'function') define(definition)
3  else if (typeof module != 'undefined') module.exports = definition()
4  else this[name] = definition()
5}('klass', function () {
6  var context = this
7    , old = context.klass
8    , f = 'function'
9    , fnTest = /xyz/.test(function () {xyz}) ? /\bsupr\b/ : /.*/
10    , proto = 'prototype'
11
12  function klass(o) {
13    return extend.call(isFn(o) ? o : function () {}, o, 1)
14  }
15
16  function isFn(o) {
17    return typeof o === f
18  }
19
20  function wrap(k, fn, supr) {
21    return function () {
22      var tmp = this.supr
23      this.supr = supr[proto][k]
24      var ret = fn.apply(this, arguments)
25      this.supr = tmp
26      return ret
27    }
28  }
29
30  function process(what, o, supr) {
31    for (var k in o) {
32      if (o.hasOwnProperty(k)) {
33        what[k] = isFn(o[k])
34          && isFn(supr[proto][k])
35          && fnTest.test(o[k])
36          ? wrap(k, o[k], supr) : o[k]
37      }
38    }
39  }
40
41  function extend(o, fromSub) {
42    // must redefine noop each time so it doesn't inherit from previous arbitrary classes
43    function noop() {}
44    noop[proto] = this[proto]
45    var supr = this
46      , prototype = new noop()
47      , isFunction = isFn(o)
48      , _constructor = isFunction ? o : this
49      , _methods = isFunction ? {} : o
50    function fn() {
51      if (this.initialize) this.initialize.apply(this, arguments)
52      else {
53        fromSub || isFunction && supr.apply(this, arguments)
54        _constructor.apply(this, arguments)
55      }
56    }
57
58    fn.methods = function (o) {
59      process(prototype, o, supr)
60      fn[proto] = prototype
61      return this
62    }
63
64    fn.methods.call(fn, _methods).prototype.constructor = fn
65
66    fn.extend = arguments.callee
67    fn[proto].implement = fn.statics = function (o, optFn) {
68      o = typeof o == 'string' ? (function () {
69        var obj = {}
70        obj[o] = optFn
71        return obj
72      }()) : o
73      process(this, o, supr)
74      return this
75    }
76
77    return fn
78  }
79
80  klass.noConflict = function () {
81    context.klass = old
82    return this
83  }
84  context.klass = klass
85
86  return klass
87});